Thanks for the post. Many of us can relate to this situation, because it is sometimes challenging when we must spend our time with heavy drinkers. In the past, it's helped me to observe my guests first thing the next morning. They are usually very tired, shuffling along and suffering from headaches or other features of the hangover we are all so familiar with. For me, it's an opportunity to feel grateful for not ever having to feel that way again. I wish you the best of luck with your parents' visit.